Glossary
NI PCI-7342 Hardware User Manual
G-8
ni.com
PWM
Pulse Width Modulation—a method of controlling the average current in a
motor phase winding by varying the on-time (duty cycle) of transistor
switches
PXI
PCI eXtensions for Instrumentation
Q
quadrature counts
the encoder line resolution times four
R
RAM
random-access memory
relative breakpoint
sets the position breakpoint for an encoder in relative quadrature counts
relative position
destination or target position for motion specified with respect to the
current location regardless of its value
relative position mode
position relative to current position
ribbon cable
a flat cable in which the conductors are side by side
RPM
revolutions per minute—units for velocity
RPSPS or RPS/S
revolutions per second squared—units for acceleration and deceleration
RTR
Ready to Receive
S
s
seconds
servo
specifies an axis that controls a servo motor
stepper
specifies an axis that controls a stepper motor
stepper <1..2> Dir
(CCW)
direction output or counter-clockwise direction control
stepper <1..2> Step
(CW)
stepper pulse output or clockwise direction control
